/**
 * Copyright 2012 Brigham Young University
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package edu.byu.nlp.util;

import java.util.Iterator;

/**
 * @author rah67
 *
 */
public class IntCounters {

	private IntCounters() { }

	public static <E> IntCounter<E> count(Iterable<E> it) {
		return count(it.iterator());
	}
	
	public static <E> IntCounter<E> count(Iterator<E> it) {
		IntCounter<E> counter = new HashIntCounter<E>();
		while (it.hasNext()) {
			counter.incrementCount(it.next());
		}
		return counter;
	}
	
	public static <E> IntCounter<E> identityCount(Iterable<E> it) {
		return identityCount(it.iterator());
	}
	
	public static <E> IntCounter<E> identityCount(Iterator<E> it) {
		IntCounter<E> counter = new IdentityIntCounter<E>();
		while (it.hasNext()) {
			counter.incrementCount(it.next());
		}
		return counter;
	}
}